A) Cr
B) \[Cr{{O}_{3}}\]
C) \[C{{r}_{2}}{{O}_{3}}\]
D) \[CrO({{O}_{2}})\]
Correct Answer: C
Solution :
Ammonium dichromate on heating to give green coloured powder of\[C{{r}_{2}}{{O}_{3}}\]. \[2{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\xrightarrow{\Delta }2{{(N{{H}_{4}})}_{2}}Cr{{O}_{4}}\] \[+\underset{\begin{smallmatrix} chromic \\ \,\,\,oxide \end{smallmatrix}}{\mathop{C{{r}_{2}}{{O}_{3}}}}\,+3{{O}_{2}}\]
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